CN201206607Y - Adjustable magnetic spring - Google Patents

Adjustable magnetic spring Download PDF

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Publication number
CN201206607Y
CN201206607Y CNU2008200697595U CN200820069759U CN201206607Y CN 201206607 Y CN201206607 Y CN 201206607Y CN U2008200697595 U CNU2008200697595 U CN U2008200697595U CN 200820069759 U CN200820069759 U CN 200820069759U CN 201206607 Y CN201206607 Y CN 201206607Y
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China
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field coil
magnet
moving
fixed magnet
magnetic
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Expired - Fee Related
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CNU2008200697595U
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Chinese (zh)
Inventor
李香龙
张炜
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Henan University
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Henan University
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Abstract

An adjustable magnetic force spring comprises an electrical control regulation device and a loading shell body. A hollow pipe-shaped excitation winding is arranged in the loading shell body; the excitation winding is electrically connected with the electrical control regulation device; a moving magnet and a fixed magnet are arranged in a pipe-shaped inner cavity of the excitation winding with opposite magnet poles face each other; the axial length of the excitation winding is larger than the total length of the moving magnet and the fixed magnet in the same direction; the fixed magnet is fixedly arranged on one end part of the excitation winding; a pull rod is connected to the moving magnet; and the end part of the pull rod, which is far from the moving and fixed magnets penetrates out of the loading shell body. When the excitation winding is electrified, the excitation winding can generate a magnetic field which can influence the gravitational force between the moving and the fixed magnets. Based on the principle, the electrical control regulation device regulates the amperage in the excitation winding, thereby changing the elasticity of a magnetic spring and achieving the purpose of regulating the elasticity of the spring.

Description

A kind of adjustable magnetic spring
Technical field
The utility model relates to magnetic spring, relates in particular to a kind of adjustable magnetic spring.
Background technique
Present existing spring is to utilize intrinsic elastic characteristic of material and geometrical shape to be made mostly, and is definite once making elastic force stool and urine.Liquid or gas spring that principle makes can change the elastic force size to utilize liquid gas pressure to contract, in use, have easy leakage, pipeline heaviness, control inaccuracy, speed of response slow, use, shortcomings such as maintenance inconvenience.Existing magnetic spring is not because the structure that adopts makes full use of the magnetic energy of magnet, exists the little and elastic force size of elastic force shortcoming such as can not regulate yet.
The model utility content
The purpose of this utility model provides a kind of adjustable magnetic spring, and its elastic force size can be adjusted, control.
A kind of adjustable magnetic spring, wherein: it comprises an automatically controlled controlling device and a loading housing, loads the field coil that is provided with hollow, tubulose in the housing, and this field coil is electrically connected with this automatically controlled controlling device; One moving magnet, a fixed magnet opposite pole are oppositely arranged in the tubular intracavity of this field coil, the axial length of this field coil is greater than the total length in the same way of moving magnet, fixed magnet, fixed magnet is fixedly arranged on an end of this field coil, be connected with a pull bar on the moving magnet, pull bar passes the loading housing away from end moving, fixed magnet.
Described adjustable magnetic spring, wherein: the end face of relative moving magnet is provided with beam on the fixed magnet.
Described adjustable magnetic spring, wherein: in the described loading housing, the end that wears pull bar is provided with a dish-shaped ring set that is set in the pull bar periphery, also is provided with a string gasket ring that is enclosed within the pull bar periphery between dish-shaped ring set and the described field coil.
Described adjustable magnetic spring, wherein: described automatically controlled controlling device comprises a direct current power supply and an adjustable potentiometer, this DC electrical source, adjustable potentiometer and described field coil constitute series loop.
Described adjustable magnetic spring, wherein: described loading housing is cylindric hollow casing, and is coaxial with described pull bar, and its two ends are provided with end cap, wherein has the tie rod hole that passes for pull bar on the end cap; Described field coil is the straight cylindrical field coil, and housing is coaxial with loading, its external diameter and loading housing internal diameter coupling; It is the cylindric of magnetic pole that described moving, fixed magnet is two ends, all is set to field coil coaxially, and the internal diameter of both diameters and field coil is complementary.
A kind of adjustable magnetic spring, wherein: it comprises an automatically controlled controlling device and a loading housing, loads the field coil that is provided with hollow, tubulose in the housing, and this field coil is electrically connected with this automatically controlled controlling device; One moving magnet, a fixed magnet like pole are oppositely arranged in the tubular intracavity of this field coil, the axial length of this field coil is greater than the total length in the same way of moving magnet, fixed magnet, fixed magnet is fixedly arranged on an end of this field coil, be connected with a depression bar on the moving magnet, depression bar passes the loading housing away from end moving, fixed magnet.
Described adjustable magnetic spring, wherein: the end face of relative moving magnet is provided with beam on the fixed magnet.
Described adjustable magnetic spring, wherein: in the described loading housing, the end that wears depression bar is provided with a dish-shaped ring set that is set in the depression bar periphery, also is provided with a string gasket ring that is enclosed within the depression bar periphery between dish-shaped ring set and the described field coil.
Described adjustable magnetic spring, wherein: described automatically controlled controlling device comprises a direct current power supply and an adjustable potentiometer, this DC electrical source, adjustable potentiometer and described field coil constitute series loop.
Described adjustable magnetic spring, wherein: described loading housing is cylindric hollow casing, and is coaxial with depression bar, and its two ends are provided with end cap, wherein has the strut kong that the voltage supply bar passes on the end cap; Described field coil is the straight cylindrical field coil, and housing is coaxial with loading, its external diameter and loading housing internal diameter coupling; It is the cylindric of magnetic pole that described moving, fixed magnet is two ends, all is set to field coil coaxially, and the internal diameter of both diameters and field coil is complementary.
The utility model adopts technique scheme will reach following technique effect:
A kind of adjustable magnetic spring that is provided with pull bar that provides of the present utility model is the tension type spring, moving, fixed magnet is that opposite pole is oppositely arranged, the principle of inhaling mutually according to opposite pole, has gravitation between the moving fixed magnet, to move, the logical electric current of going up in the outer tubulose field coil that is provided with of fixed magnet, to have magnetic field in the tubular space of field coil, with automatically controlled controlling device control sense of current, size of current, get final product this field pole direction of corresponding control, magnitude of field intensity, if the magnetic direction that control produces is with moving, the magnetic direction unanimity that produces between the fixed magnet, with the gravitation that increases between the moving fixed magnet, and the size of current in the adjustment field coil, with the gravitation controlled amount that makes between the fixed magnet; In like manner, if the magnetic direction that produces between the magnetic direction that control produces and moving, the fixed magnet is opposite, will reduces the gravitation between the moving fixed magnet, and adjust the size of current that circulates in the field coil, promptly may command is moved the gravitation size between the fixed magnet; According to above-mentioned principle, the elastic force of this tension type magnetic spring is adjusted as required.
The adjustable magnetic spring that the another kind that provides of the present utility model is provided with depression bar is the pressure-type spring, moving, fixed magnet is that like pole is oppositely arranged, the principle of repelling each other according to like pole, has repulsive force between the moving fixed magnet, to move, the logical electric current of going up in the outer tubulose field coil that is provided with of fixed magnet, to have magnetic field in the tubular space of field coil, with automatically controlled controlling device control sense of current, size of current, get final product this field pole direction of corresponding control, magnitude of field intensity, if the magnetic direction that control produces is with moving, the magnetic direction that produces between the fixed magnet is identical, with the repulsive force that increases between the moving fixed magnet, and the size of current in the adjustment field coil, with the repulsive force controlled amount that makes between the fixed magnet; In like manner, if the magnetic direction that produces between the magnetic direction that control produces and moving, the fixed magnet is opposite, will reduces the repulsive force between the moving fixed magnet, and adjust the size of current that circulates in the field coil, promptly may command is moved the size of the repulsive force between the fixed magnet; According to above-mentioned principle, the elastic force of this pressure-type magnetic spring is adjusted as required.
As fully visible, above-mentioned two kinds of adjustable magnetic springs simple in structure, the elasticity adjusting wide ranges is regulated simple, convenient.
Description of drawings
Fig. 1 is the structural representation of the adjustable magnetic spring main body of tension type;
Fig. 2 is the structural representation of the adjustable magnetic spring main body of pressure-type;
Fig. 3 is the circuit theory diagrams of automatically controlled controlling device.
Embodiment
Embodiment 1:
A kind of adjustable magnetic spring, it comprises a spring main body and an automatically controlled controlling device, the structural representation of its spring main body as shown in Figure 1, this spring main body comprises that a hollow cylindraceous loads housing 2, load housing 2 two ends and be provided with end cap, wherein have the tie rod hole that passes for pull bar 1 on the end cap; Load housing 2 and adopt high permeability magnetic material to make, be used for the shielding spring magnetic field and the conduction magnetic line of force, can prevent that on the one hand the external magnetic field from disturbing the magnetic field of spring, can prevent that on the other hand the spring internal magnetic field from disturbing external object; Load the field coil 8 that is provided with straight cylindrical in the housing, housing 2 is coaxial with loading, its external diameter with load housing 2 internal diameters coupling, this field coil 8 be connected electrically in described automatically controlled controlling device on; One moving magnet 4, a fixed magnet 5 are arranged in the hollow cavity of this field coil 8, and moving magnet 4, fixed magnet 5 are cylindrical, with field coil 8 coaxial settings; Moving, fixed magnet 4,5 is oppositely arranged (in the present embodiment for opposite pole, the N utmost point of fixed magnet 5 and the S utmost point of moving magnet 4 are oppositely arranged), be connected with a coaxial pull bar 1 on the end end face of moving magnet 4 away from fixed magnet 5, the axial length of this field coil 8 is greater than the total length in the same way of moving magnet 4, fixed magnet 5; In addition, the diameter of moving magnet 4, fixed magnet 5 matches with the internal diameter of field coil 8, make fixed magnet 5 be fixedly arranged on a end in this field coil 8, for ease of moving magnet 4 flexible motion and reduce simultaneously owing to and the internal chamber wall of field coil 8 between leave the leakage field that cause in the gap, the gap between the internal chamber wall of the outer wall of moving magnet 4 and field coil 8 is less than 0.02mm.
Pull bar 1 is coaxial with loading housing 2, field coil 8, pull bar 1 passes the end cap 10 that loads housing 2 respective end away from end moving, fixed magnet 4,5, is used to connect draw-off device, and pull bar 1 usefulness high permeability magnetic material is made, be used for when motion, reducing magnetic resistance; In addition, on the fixed magnet 5 relatively the end face of moving magnet 4 be provided with beam 7, be used to prevent that two magnet 4,5 from inhaling damaged in collision mutually.
The axial length of this field coil 8 is set to greater than moving magnet 4, the total length in the same way of fixed magnet 5, because of fixed magnet 5 is fixed, like this, in the hollow cavity of this field coil 8, leave stroke space 6 for the walking of moving magnet 4 front and back, when field coil 8 gets electric generation magnetic field, moving, fixed magnet 4, gravitation between 5 changes, if field coil 8 gets the magnetic field of electric generation with moving, fixed magnet 4, magnetic field between 5 in the same way, to increase moving, fixed magnet 4, gravitation between 5, pulling pull bar 1 needs bigger power, and the electric current [strength of circulation in the adjustment field coil 8, promptly can change field coil 8 and get the magnetic intensity of electric generation, move thereby reach to adjust, fixed magnet 4, the effect of gravitation between 5, thereby the function of realization spring; In like manner, if field coil 8 electric generation magnetic field with move, FR between the fixed magnet 4,5, reduce to move, the gravitation between the fixed magnet 4,5, pulling pull bar 1 needs littler power, adjust the electric current [strength of circulation in the field coil 8, change the gravitation between moving, the fixed magnet 4,5, thereby adjust the elastic force size of spring.
In addition, in the described loading housing 2, the end that wears pull bar 1 is provided with a dish-shaped ring set 9 that is set in the pull bar periphery, dish ring set 9 is the dish that an end is big, the other end is little, have the straight hole that passes the both ends of the surface center, be used for passing for pull bar 1, dish-shaped ring set 9 adopts high permeability materials to make, be used for reducing magnetic field moving, that fixed magnet 4,5 produces and field coil 8 the magnetic resistance of magnetic circuit in magnetic field of electric generation; Ring set 9 adopts dish, is in order further to reduce the magnetic resistance of magnetic circuit, to utilize the poly-magnetic property at its tip, the magnetic Lubricants is attracted to the surface of the diameter of dish-shaped ring set 9 than small end and pull bar 1, pull bar 1 being lubricated, to reduce friction factor; The center straight hole of dish ring set 9 and the gap between the pull bar 1 to reduce leakage field between the two, further reduce magnetic resistance preferably less than 0.02mm.
Also be provided with the gasket ring 3 that a string is enclosed within the pull bar periphery between dish ring set 9 and the described field coil 8, be used for fixing field coil 8 on the one hand, on the other hand, can slow down impact force when moving magnet 4 is moved to limit position by pull bar 1, the protection spring is not fragile.
Described automatically controlled controlling device circuit theory diagrams as shown in Figure 3, it comprises a direct current power supply E, an adjustable potentiometer W, DC electrical source E, adjustable potentiometer W and described field coil 8 (L) constitute series loop, regulate the resistance of adjustable potentiometer W, can change the electric current [strength in the field coil 8, thereby reach the purpose of adjusting the spring force size.
The electromagnetic process of this embodiment's magnetic spring is: the magnetic circuit that moving magnet 4 and fixed magnet 5 produces by the S utmost point of fixed magnet 5 through loading the interior ring window of housing 2 (high permeability magnetic material) to end cap that loads housing 2 and dish-shaped ring set 9, reach the N utmost point of pull bar 1 circular shaft again, at the N utmost point formation magnetic loop of the S of moving magnet 4 utmost point and fixed magnet 5 to moving magnet 4.Reasonable for the magnetic circuit of selecting, magnetic resistance is little, and magnetic potential can most all be accumulated between the S utmost point and the N utmost point of moving magnet 4 and fixed magnet 5, and moving magnet 4, fixed magnet 5 adopt permanent-magnet material, and the remanent magnetism scope of selecting for use is 0.5-1T, and the induction coercivity is greater than 500kA/m; Loading housing 2 and dish-shaped ring set 9 is soft magnetic material, and selecting saturation induction density for use is the permeability magnetic material of 1.7-3T; The sectional area of pull bar 1 should be greater than the magnetic circuit area of 0.5 times moving magnet 4, and saturation induction density is greater than 2T, and coercivity is less than 50A/m; Effective magnetic conduction road sectional area of dish ring set 9 should be greater than the 4-10 of the sectional area of pull bar 1 doubly; Also should consider the magnetic induction intensity that field coil 8 produces simultaneously, the magnetic saturation phenomenon occur for avoiding a pull bar 1, the cross-section area of pull bar should be greater than the sectional area of 0.8 times moving magnet 4.Because the permeability of air be permeability magnetic material permeability several ten thousand/, so the leakage field of this magnetic loop is quite little.Though pull bar 1 and dish-shaped ring set 9 have the gap less than 0.02mm, on the one hand owing to adopt magnetic conduction liquid to be filled in pull bar 1 and dish-shaped ring set 9 gaps (magnetic hold-up magnetic induction intensity is 0.2-0.3T); To contact area big for pull bar 1 and 9 of dish-shaped ring sets on the other hand, so both magnetic resistance are quite little.When the magnetic direction that produces behind the feeding direct current (d.c.) in the field coil 8 was consistent with magnetic directions moving, that fixed magnet 4,5 produces, the stack of two magnetic intensities had increased magnetic force, causes this magnetic spring elastic force to increase.
The working principle of this magnetic spring is: when pull bar 1 in the time spent of doing that does not have external force, pull bar 1 moves to fixed magnet 5 directions under the magnetic force of moving magnet 4 drives, and when pull bar 1 by the draw-off device of peripheral hardware pulling, when making moving magnet 4, overcome two attraction forces between magnetic pole away from fixed magnet 5; When removing external force or external force when reducing, because the effect of attraction force, moving magnet 4 will reset or reach and the position of outer equilibrium of forces; When feeding electric current in the field coil 8 when making the magnetic direction of its generation consistent with magnetic directions moving, that fixed magnet 4,5 produces, increased magnetic intensity, cause magnetic force to increase, spur the required also corresponding increase of external force of pull bar 1, the principle of elastic force increase that Here it is; If need reduce elastic force, the generation magnetic direction electric current identical with magnetic direction moving, that fixed magnet 4,5 produces that only need reduce to feed in the field coil 8 gets final product.As fully visible, present embodiment has realized utilizing prior art, regulates the purpose of elastic force size by regulating the size of current that feeds in the field coil 8
Fig. 3 is the schematic diagram of the automatically controlled regulating circuit of spring, another scheme is can be with adjustable potentiometer W and power supply E, change switch power into and carry out the adjusting of size of current, also having a kind of scheme is DC electrical source E to be changed into adjustable D.C. regulated power supply, do not need adjustable potentiometer W this moment, can reach the purpose of size of current in the regulating loop equally.
Embodiment 2:
A kind of adjustable magnetic spring, it comprises a spring main body and an automatically controlled controlling device, the structural representation of its spring main body as shown in Figure 1, this spring main body comprises that a hollow cylindraceous loads housing 2, load housing 2 two ends and be provided with end cap, wherein have the strut kong that voltage supply bar 1 passes on the end cap; Load housing 2 and adopt high permeability magnetic material to make, be used for the shielding spring magnetic field and the conduction magnetic line of force, can prevent that on the one hand the external magnetic field from disturbing the magnetic field of spring, can prevent that on the other hand the spring internal magnetic field from disturbing external object; Load the field coil 8 that is provided with straight cylindrical in the housing, housing 2 is coaxial with loading, its external diameter with load housing 2 internal diameters coupling, this field coil 8 be connected electrically in described automatically controlled controlling device on; One moving magnet 4, a fixed magnet 5 are arranged in the hollow cavity of this field coil 8, and moving magnet 4, fixed magnet 5 are cylindrical, with field coil 8 coaxial settings; Moving, fixed magnet 4,5 is oppositely arranged (in the present embodiment for the same polarity magnetic pole, the N utmost point of fixed magnet 5 and the N utmost point of moving magnet 4 are oppositely arranged), be connected with a coaxial depression bar 1 on the end end face of moving magnet 4 away from fixed magnet 5, the axial length of this field coil 8 is greater than the total length in the same way of moving magnet 4, fixed magnet 5; In addition, the diameter of moving magnet 4, fixed magnet 5 matches with the internal diameter of field coil 8, make fixed magnet 5 be fixedly arranged on a end in this field coil 8, for ease of moving magnet 4 flexible motion and reduce simultaneously owing to and the internal chamber wall of field coil 8 between leave the leakage field that cause in the gap, the gap between the internal chamber wall of the outer wall of moving magnet 4 and field coil 8 is less than 0.1mm.
Depression bar 1 is coaxial with loading housing 2, field coil 8, depression bar 1 passes the end cap 10 that loads housing 2 respective end away from end moving, fixed magnet 4,5, is used to connect pressure unit, and depression bar 1 usefulness high permeability magnetic material is made, be used for when motion, reducing magnetic resistance; In addition, on the fixed magnet 5 relatively the end face of moving magnet 4 be provided with beam 7, be used to prevent that two magnet 4,5 from inhaling damaged in collision mutually.
The axial length of this field coil 8 is set to the total length in the same way greater than moving magnet 4, fixed magnet 5, and is fixing because of fixed magnet 5, like this, leaves the stroke space 6 for the walking of moving magnet 4 front and back in the hollow cavity of this field coil 8; When field coil 8 gets electric generation magnetic field, repulsive force between moving, the fixed magnet 4,5 changes, if field coil 8 the magnetic field of electric generation and fixed magnet 5 magnetic field in the same way, repulsive force between, the fixed magnet 4,5 moving with increasing, pushing this depression bar 1 needs bigger power, and adjusts the electric current [strength of circulation in the field coil 8, promptly can change field coil 8 to get the magnetic intensity of electric generation, thereby reach the effect of adjusting repulsive force between moving, the fixed magnet 4,5, thereby realize the function of spring; In like manner, if field coil 8 gets the magnetic field of electric generation and the FR of fixed magnet 5, to reduce to move, the repulsive force between the fixed magnet 4,5, pushing this depression bar 1 uses less power to get final product, adjust the electric current [strength of circulation in the field coil 8, change the repulsive force between moving, the fixed magnet 4,5, thereby adjust the elastic force size of spring.
In addition, in the described loading housing 2, the end that wears depression bar 1 is provided with a dish-shaped ring set 9 that is set in depression bar 1 periphery, it is big that dish ring set 9 is an end, the dish that the other end is little, have the straight hole that passes the both ends of the surface center, being used for voltage supply bar 1 passes, dish ring set 9 adopts high permeability material to make, be used for reducing moving, fixed magnet 4,5 magnetic fields that produce and field coil 8 the magnetic resistance of the magnetic circuit in the magnetic field of electric generation, ring set 9 adopts dish, is in order further to reduce the magnetic resistance of magnetic circuit, utilize the poly-magnetic property at its tip, the magnetic Lubricants is attracted to the surface of the diameter of dish-shaped ring set 9, depression bar 1 is lubricated, to reduce friction factor than small end and depression bar 1; The center straight hole of dish ring set 9 and the gap between the depression bar 1 to reduce leakage field between the two, further reduce magnetic resistance preferably less than 0.02mm.
Also be provided with the gasket ring 3 that a string is enclosed within depression bar 1 periphery between dish ring set 9 and the described field coil 8; on the one hand be used for fixing field coil 8, on the other hand, can be ostracised at moving magnet 4 and try hard to recommend when being pressed onto limit position; slow down impact force, the protection spring is not fragile.
Described automatically controlled controlling device circuit theory diagrams as shown in Figure 3, it comprises a direct current power supply E, an adjustable potentiometer W, DC electrical source E, adjustable potentiometer W and described field coil 8 (L) constitute series loop, regulate the resistance of adjustable potentiometer W, can change the electric current [strength in the field coil 8, thereby reach the purpose of adjusting the spring force size.
The electromagnetic process of this embodiment's magnetic spring is: the magnetic circuit that moving magnet 4 and fixed magnet 5 produces by the S utmost point of fixed magnet 5 through loading the interior ring window of housing 2 (high permeability magnetic material) to end cap that loads housing 2 and dish-shaped ring set 9, reach the N utmost point of the circular shaft of pull bar 1 again, at the N utmost point formation magnetic loop of the S of moving magnet 4 utmost point and fixed magnet 5 to moving magnet 4.Reasonable for the magnetic circuit of selecting, magnetic resistance is little, and magnetic potential can most all be accumulated between the S utmost point and the N utmost point of moving magnet 4 and fixed magnet 5, and moving magnet 4, fixed magnet 5 adopt permanent-magnet material, and selecting the remanent magnetism scope for use is 0.5-1T, and the induction coercivity is greater than 500kA/m; Loading housing 2 and dish-shaped ring set 9 is soft magnetic material, and selecting saturation induction density for use is the permeability magnetic material of 1.7-3T; The sectional area of pull bar 1 should be greater than the magnetic circuit area of 0.5 times moving magnet 4, and saturation induction density is greater than 2T, and coercivity is less than 50A/m; Effective magnetic conduction road sectional area of dish ring set 9 should be greater than the 4-10 of the sectional area of pull bar 1 doubly; Also should consider the magnetic induction intensity that field coil 8 produces simultaneously, the magnetic saturation phenomenon occur for avoiding pull bar 1, the cross-section area of pull bar 1 should be greater than the sectional area of 0.8 times moving magnet 4.Because the permeability of air be permeability magnetic material permeability several ten thousand/, so the leakage field of this magnetic loop is quite little.Though pull bar 1 and dish-shaped ring set 9 have the gap less than 0.1mm, on the one hand owing to adopt magnetic conduction liquid to be filled in pull bar 1 and dish-shaped ring set 9 gaps (magnetic hold-up magnetic induction intensity is 0.2-0.3T); To contact area big for pull bar 1 and 9 of dish-shaped ring sets on the other hand, so both magnetic resistance are quite little.When the magnetic direction of magnetic direction that produces behind the feeding direct current (d.c.) in the field coil 8 and fixed magnet 5 generations was consistent, the stack of two magnetic intensities had increased magnetic force, causes this magnetic spring elastic force to increase.
The working principle of this magnetic spring is: when depression bar 1 in the time spent of doing that does not have external force, depression bar 1 moves to the direction away from fixed magnet 5 under the magnetic force of moving magnet 4 drives, pushed by the pressure unit of peripheral hardware and work as depression bar 1, make moving magnet 4 when fixed magnet 5 moves, overcome two repulsive forces between like pole; When removing external force or external force when reducing, because the effect of repulsive force, moving magnet 4 will reset or reach and the position of outer equilibrium of forces; When feeding magnetic direction that magnetic direction that electric current makes its generation and fixed magnet 5 produce in the field coil 8 when consistent, increased magnetic intensity, cause the magnetic force increase, push the required also corresponding increase of external force of this depression bar 1, the principle of elastic force increase that Here it is; If need reduce elastic force, the generation magnetic direction electric current identical with the magnetic direction of fixed magnet 5 generations that only need reduce to feed in the field coil 8 gets final product.As fully visible, present embodiment has realized utilizing prior art, regulates the purpose of elastic force size by regulating the size of current that feeds in the field coil 8.
Fig. 3 is the schematic diagram of the automatically controlled regulating circuit of spring, another scheme is can be with adjustable potentiometer W and power supply E, change switch power into and carry out the adjusting of size of current, also having a kind of scheme is DC electrical source E to be changed into adjustable D.C. regulated power supply, do not need adjustable potentiometer W this moment, can reach the purpose of size of current in the regulating loop equally.
The field coil of above-mentioned tension type, pressure-type spring and control circuit all can carry out forward and reverse control.When adding forward current for sharp field coil, magnetic intensity increases elastic force along with increase, and when field coil added back current, magnetic intensity reduced elastic force along with reducing.
When not adding exciting curent, the size of the elastic force of two kinds of springs becomes the inverse square relation with deformation quantity, calculates by following formula:
The elastic force size of extension spring is by formula: F = μ 0 m 1 m 2 4 π ( d + x ) 2 (formula 1)
The elastic force size of stage clip is by formula: F = μ 0 m 1 m 2 4 π ( R - x ) 2 (formula 2)
Wherein, R=d+x, R are the range of moving magnet, and d is a beam thickness, and x is the spring deformation amount, i.e. the actual displacement of pull bar or depression bar; In formula (1), the formula (2), F is elastic force (N), m 1Be moving magnet band magnetic charge amount (A/m), m 2Be fixed magnet band magnetic charge amount (A/m), μ 0Be space permeability.
When being given in exciting curent below, the elastic force formula (formula 4) of elastic force formula of extension spring (formula 3) and stage clip, below in the formula (3), formula (4), F is elastic force (N), I is the electric current [strength (A) in the field coil, n is the excitatory wire turn number of turns, μ 0Be space permeability:
Tension spring is: F = μ 0 ( R + x ) 2 ( m 1 m 2 4 π ± μ 0 n 2 I 2 ) (formula 3)
(wherein " ± " refers to: add forward current for+, add back current for-).
Stage clip elastic force is: F = μ 0 ( R - x ) 2 ( m 1 m 2 4 π ± μ 0 n 2 I 2 ) (formula 4)
(wherein " ± " refers to: add forward current for+, add back current for-.)
The aforementioned calculation formula derives out according to law of conservation of energy, and this kind structure magnetic spring elastic force error that elastic force that calculates with said method and actual fabrication go out is little.Should equal the variation rule of elastic potential energy (deformation potential) and deformation quantity during calculating by: elastic force F, promptly F = - dE dX , DE is deformation potential variable Nm (newton, a rice) in the formula, and dX is deformation quantity m (rice).

Claims (10)

1, a kind of adjustable magnetic spring is characterized in that: it comprises an automatically controlled controlling device and a loading housing, loads the field coil that is provided with hollow, tubulose in the housing, and this field coil is electrically connected with this automatically controlled controlling device; One moving magnet, a fixed magnet opposite pole are oppositely arranged in the tubular intracavity of this field coil, the axial length of this field coil is greater than the total length in the same way of moving magnet, fixed magnet, fixed magnet is fixedly arranged on an end of this field coil, be connected with a pull bar on the moving magnet, pull bar passes the loading housing away from end moving, fixed magnet.
2, adjustable magnetic spring as claimed in claim 1 is characterized in that: the end face of relative moving magnet is provided with beam on the fixed magnet.
3, adjustable magnetic spring as claimed in claim 2, it is characterized in that: in the described loading housing, the end that wears pull bar is provided with a dish-shaped ring set that is set in the pull bar periphery, also is provided with a string gasket ring that is enclosed within the pull bar periphery between dish-shaped ring set and the described field coil.
4, as each described adjustable magnetic spring of claim 1 to 3, it is characterized in that: described automatically controlled controlling device comprises a direct current power supply and an adjustable potentiometer, and this DC electrical source, adjustable potentiometer and described field coil constitute series loop.
5, as each described adjustable magnetic spring of claim 1 to 3, it is characterized in that: described loading housing is cylindric hollow casing, and is coaxial with described pull bar, and its two ends are provided with end cap, wherein has the tie rod hole that passes for pull bar on the end cap; Described field coil is the straight cylindrical field coil, and housing is coaxial with loading, its external diameter and loading housing internal diameter coupling; It is the cylindric of magnetic pole that described moving, fixed magnet is two ends, all is set to field coil coaxially, and the internal diameter of both diameters and field coil is complementary.
6, a kind of adjustable magnetic spring is characterized in that: it comprises an automatically controlled controlling device and a loading housing, loads the field coil that is provided with hollow, tubulose in the housing, and this field coil is electrically connected with this automatically controlled controlling device; One moving magnet, a fixed magnet like pole are oppositely arranged in the tubular intracavity of this field coil, the axial length of this field coil is greater than the total length in the same way of moving magnet, fixed magnet, fixed magnet is fixedly arranged on an end of this field coil, be connected with a depression bar on the moving magnet, depression bar passes the loading housing away from end moving, fixed magnet.
7, adjustable magnetic spring as claimed in claim 6 is characterized in that: the end face of relative moving magnet is provided with beam on the fixed magnet.
8, adjustable magnetic spring as claimed in claim 7, it is characterized in that: in the described loading housing, the end that wears depression bar is provided with a dish-shaped ring set that is set in the depression bar periphery, also is provided with a string gasket ring that is enclosed within the depression bar periphery between dish-shaped ring set and the described field coil.
9, as each described adjustable magnetic spring of claim 6 to 8, it is characterized in that: described automatically controlled controlling device comprises a direct current power supply and an adjustable potentiometer, and this DC electrical source, adjustable potentiometer and described field coil constitute series loop.
10, as each described adjustable magnetic spring of claim 6 to 8, it is characterized in that: described loading housing is cylindric hollow casing, and is coaxial with depression bar, and its two ends are provided with end cap, wherein has the strut kong that the voltage supply bar passes on the end cap; Described field coil is the straight cylindrical field coil, and housing is coaxial with loading, its external diameter and loading housing internal diameter coupling; It is the cylindric of magnetic pole that described moving, fixed magnet is two ends, all is set to field coil coaxially, and the internal diameter of both diameters and field coil is complementary.
CNU2008200697595U 2008-03-27 2008-03-27 Adjustable magnetic spring Expired - Fee Related CN201206607Y (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103185098A (en) * 2011-12-31 2013-07-03 上海汽车集团股份有限公司 Electromagnetic spring vibration absorber
CN103291813A (en) * 2013-06-25 2013-09-11 苏州唐氏机械制造有限公司 Working method of buffer automatically attracting and releasing slider
CN103612275A (en) * 2013-12-05 2014-03-05 吴中区甪直渡岘工艺品厂 Die cutting machine electromagnetic pressure gauge
CN104912928A (en) * 2013-06-25 2015-09-16 苏州唐氏机械制造有限公司 Linear guide rail for preventing rebounding of slide block due to too large impact energy
TWI577513B (en) * 2009-04-29 2017-04-11 諾菲勒斯系統公司 Magnetic rotational hardstop for robot
CN112044537A (en) * 2020-09-11 2020-12-08 文辉 Grinding assembly for colloid mill

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI577513B (en) * 2009-04-29 2017-04-11 諾菲勒斯系統公司 Magnetic rotational hardstop for robot
CN103185098A (en) * 2011-12-31 2013-07-03 上海汽车集团股份有限公司 Electromagnetic spring vibration absorber
CN103185098B (en) * 2011-12-31 2017-02-08 上海汽车集团股份有限公司 Electromagnetic spring vibration absorber
CN103291813A (en) * 2013-06-25 2013-09-11 苏州唐氏机械制造有限公司 Working method of buffer automatically attracting and releasing slider
CN103291813B (en) * 2013-06-25 2015-08-26 苏州飞华铝制工业有限公司 The method of work of the buffer of a kind of automatic pick, release slider
CN104912928A (en) * 2013-06-25 2015-09-16 苏州唐氏机械制造有限公司 Linear guide rail for preventing rebounding of slide block due to too large impact energy
CN103612275A (en) * 2013-12-05 2014-03-05 吴中区甪直渡岘工艺品厂 Die cutting machine electromagnetic pressure gauge
CN112044537A (en) * 2020-09-11 2020-12-08 文辉 Grinding assembly for colloid mill

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